| 1 | /* A very simple string class. |
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| 2 | Copyright (C) 2015-2025 Free Software Foundation, Inc. |
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| 3 | |
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| 4 | This program is free software; you can redistribute it and/or modify it |
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| 5 | under the terms of the GNU General Public License as published by the |
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| 6 | Free Software Foundation; either version 3, or (at your option) any |
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| 7 | later version. |
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| 8 | |
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| 9 | This program is distributed in the hope that it will be useful, |
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| 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 12 | GNU General Public License for more details. |
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| 13 | |
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| 14 | You should have received a copy of the GNU General Public License |
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| 15 | along with this program; see the file COPYING3. If not see |
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| 16 | <http://www.gnu.org/licenses/>. |
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| 17 | |
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| 18 | In other words, you are welcome to use, share and improve this program. |
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| 19 | You are forbidden to forbid anyone else to use, share and improve |
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| 20 | what you give them. Help stamp out software-hoarding! */ |
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| 21 | |
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| 22 | #ifndef LIBCPP_LABEL_TEXT_H |
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| 23 | #define LIBCPP_LABEL_TEXT_H |
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| 24 | |
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| 25 | /* A struct for the result of range_label::get_text: a NUL-terminated buffer |
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| 26 | of localized text, and a flag to determine if the caller should "free" the |
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| 27 | buffer. */ |
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| 28 | |
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| 29 | class label_text |
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| 30 | { |
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| 31 | public: |
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| 32 | label_text () |
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| 33 | : m_buffer (NULL), m_owned (false) |
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| 34 | {} |
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| 35 | |
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| 36 | ~label_text () |
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| 37 | { |
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| 38 | if (m_owned) |
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| 39 | free (ptr: m_buffer); |
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| 40 | } |
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| 41 | |
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| 42 | /* Move ctor. */ |
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| 43 | label_text (label_text &&other) |
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| 44 | : m_buffer (other.m_buffer), m_owned (other.m_owned) |
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| 45 | { |
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| 46 | other.release (); |
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| 47 | } |
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| 48 | |
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| 49 | /* Move assignment. */ |
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| 50 | label_text & operator= (label_text &&other) |
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| 51 | { |
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| 52 | if (m_owned) |
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| 53 | free (ptr: m_buffer); |
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| 54 | m_buffer = other.m_buffer; |
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| 55 | m_owned = other.m_owned; |
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| 56 | other.release (); |
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| 57 | return *this; |
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| 58 | } |
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| 59 | |
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| 60 | /* Delete the copy ctor and copy-assignment operator. */ |
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| 61 | label_text (const label_text &) = delete; |
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| 62 | label_text & operator= (const label_text &) = delete; |
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| 63 | |
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| 64 | /* Create a label_text instance that borrows BUFFER from a |
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| 65 | longer-lived owner. */ |
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| 66 | static label_text borrow (const char *buffer) |
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| 67 | { |
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| 68 | return label_text (const_cast <char *> (buffer), false); |
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| 69 | } |
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| 70 | |
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| 71 | /* Create a label_text instance that takes ownership of BUFFER. */ |
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| 72 | static label_text take (char *buffer) |
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| 73 | { |
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| 74 | return label_text (buffer, true); |
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| 75 | } |
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| 76 | |
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| 77 | void release () |
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| 78 | { |
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| 79 | m_buffer = NULL; |
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| 80 | m_owned = false; |
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| 81 | } |
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| 82 | |
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| 83 | const char *get () const |
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| 84 | { |
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| 85 | return m_buffer; |
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| 86 | } |
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| 87 | |
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| 88 | bool is_owner () const |
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| 89 | { |
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| 90 | return m_owned; |
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| 91 | } |
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| 92 | |
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| 93 | private: |
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| 94 | char *m_buffer; |
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| 95 | bool m_owned; |
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| 96 | |
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| 97 | label_text (char *buffer, bool owned) |
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| 98 | : m_buffer (buffer), m_owned (owned) |
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| 99 | {} |
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| 100 | }; |
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| 101 | |
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| 102 | #endif /* !LIBCPP_LABEL_TEXT_H */ |
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| 103 | |
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